Quote:
Originally Posted by Paul Harm
From everything I've read only the Fed209A and CCI209M are hot primers. Everything else is about the same with slight differences. Remington primers are usually considered the ones giving the least pressure. I use the Cheddite primer and if loading at low pressure, say under 7500psi, I don't worry which of the mild primers is used in a formula. The pressure won't change all that much. PB, 7625, and 4756 are all discontinued. It's too bad because many of us liked them. American Select, Promo, Red Dot, Green Dot, and E3 are some of the powders I've used for light low pressure loads. I'm sure there's many others.
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Paul, if you look at the loading manuals and compare loads, you'll see that Winchester primers are relatively hot, especially when using compression formed AA hulls. You are right about IMR 4756 being no longer made. I used to buy a few 8 pound canisters at a time to get a discount and have about four pounds left.
With the CCI regular primers, my target 12 bore loads developed only 6,600 PSI with minimal recoil. I used the CCI primer to get under 7,000 PSI. I couldn't do that with any other primer except for Remington which is a tad higher pressure than the CCI.
For my taste, red dot has relatively high pressure and green dot less so. When my 4756 is gone, I'll go to 700X. I don't like American Select because I can't get the pressures where I want them.
I like to keep my 12 bore target loads under 7,000 psi. I shoot a ton of them through my Parkers and the lower recoil is easier on old wood.